Hi Andrew, Would it just be easier to have those of us who want a board to wire you the money via WU or Money Gram?
Just a thought. Best, Joe Consciousness affects the medium. Think happy, be happy, and happiness will follow you. On Tuesday, February 4, 2014 9:07 PM, nbreeden <[email protected]> wrote: Andrew, Please put me down for one. -Neil On Sunday, January 5, 2014 12:39:03 PM UTC-8, lynchaj wrote: Hi! > >We are about to do another run of our popular S-100 Bus Z80 CPU V2 board. >This board can run in systems (with bus termination etc.) at up to 10MHz. >Apart from all the then common features found on many older S100 Z80 boards >(and being completely S-100 IEEE-696 compliant), it had an extremely clever >and powerful ability to allow the Z80 to address up to 1 MG of RAM in 16K >"windows" within the Z80's address space. This is described here:- > >http://www.s100computers.com/My%20System%20Pages/Z80%20Board/Z80%20CPU%20Board.htm > >Its primary importance is that it can be used to address greater than 64K of >RAM for CPM3 and that it can be used to load/examine 8086 code at the top of >the 1MG address space. > >The new “V2” version of the board now has the ability to (under software >control) dynamically switch between two 4K blocks of code in its onboard >28C64 EEPROM (or EPROM) yet still only occupy 4K in the Z80’s 64K memory >space. This in effect almost doubles the size of a possible Z80 monitor. The >extra code (currently being written) will include things like directly >downloading binary files from a PC into the Z80’s 64K (or 8086’s 1M) address >space. > >In addition, the S-100 Z80 CPU V2 has the ability to use an external CPU clock >from an external source (S-100 bus pin 66 aka NDEF3). This is essential for >CPU to video synchronization for MSX compatibility particularly in games. >There will be a corresponding ability to export a CPU clock signal on the next >version of the S-100 VDP board although this could come from any S-100 board. > >Current owners of the V1 board can just switch the IC’s to this new bare >board. > >The S-100 Z80 CPU V2 PCBs will be $20 each as per the usual arrangement. >Shipping in the US is $3 for a single PCB and $2 for each additional PCB. >Shipping internationally is $12.75 for a single PCB and $3 for each additional >PCB. This is for the bare basics USPS first class postage with no tracking or >insurance. The builder assumes all risk of delivery as per usual arrangement. > >My preference is to sell these PCBs to vintage computer/home brew >computer/classic computer hobbyists first but if there are any remaining >boards I will put them on eBay. > >Please send a PayPal to [email protected] with the subject “S-100 Z80 CPU V2 >board” and I will reserve your board(s). I need about 20 pre-orders to >warrant a manufacturing run. I will post more information as it becomes >available. > >Thanks and have a nice day! > >Andrew Lynch -- You received this message because you are subscribed to a topic in the Google Groups "N8VEM-S100" group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/n8vem-s100/kykzZvgxMYk/unsubscribe. To unsubscribe from this group and all its topics, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
